8 



MR. G. \. VERNON ON THE IRREGULAR BAROMETRIC 



Geneva. 



Great St. Bernard. 





Amount of 



Number of 



Amount of 



Number of 





oscillation. 



oscillations. 



oscillation. 



oscillations. 





inches. 





inches. 





1848. 



44-079 



168 



Incom plete. 



1849. 



41-536 



167 



33*384 169 



1850. 



39*434 



169 



32*070 168 



1851. 



35*308 



179 



^9*433 154 



1852. 



39*834 



161 



31-961 149 



1853. 



39*533 



173 



Incom,plete. 



1854. 



36-995 



183 



31-562 1 163 



1855. 



41-026 



169 



31-407 ! 152 



1856. 



41-500 



184 



33-244 166 



1857. 



31-103 



135 



26*413 124 



The maximuin amount of oscillation appears to have 

 heen in 1848, and the minimum in 1857. 



Separating the number of oscillations in each year, 

 according as they are above or below the average, we 

 find— 



Geneva. 



Oscillations compared 



with the average. 



+ 7*77 



— io"65 



Corresponding amount 

 of oscillation. 

 38'966 inches. 



39*138 V 



showing that a number of oscillations above the average 

 is accompanied by a less amount of oscillation than when 

 the number of oscillations is below the average. 



Great St. Bernard. 



Oscillations compared 



with the average. 



-f-io"9o 



-10-85 



Corresponding amount 

 of oscillation. 

 32*565 inches. 



29*804 ,, 



that is, a number of oscillations above the average is 

 accompanied by a larger amount of oscillation than when 

 the number is below the average. This is a curious fact, 

 as it is the direct converse of what takes place at Geneva. 

 Can there be a point between the two stations at which 

 the amounts of oscillation are the same, whether the 

 number is above or below the average ? 



